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> not BREAKING my wallet, drilled n' slotted disc?
post Jun 21, 2011 - 11:39 AM
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LAcelica94St

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hey dudes, i have been checking around ebay looking for some good
disc brakes. can anyone tell me what type to get, as in more bang for my
buck? Drilled or slotted or drilled and slotted? and whats this stuff about being
about being silver or zinc finish? does it matter, i just want enhanced braking power
and better handling. Any pointers?? bowdown.gif
post Jun 21, 2011 - 12:57 PM
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mak5603



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Brembo blanks. Super cheap, high quality oem replacement.


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post Jun 22, 2011 - 4:33 AM
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Galcobar

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Drilling and slotting brake rotors is really a fools game in this day and age. At a time when brake pads off-gassed, holes through the rotor were a way to ensure proper contact. Back when brake pads glazed due to high heat, slots would scrape the glazing and restore a proper friction surface.

Now neither are necessary, courtesy of modern pad formulations which prevent off-gassing, and track/race pads which do not glaze at high heat.

On the other hand, drilling holes or cutting slots in the rotor weakens the metal's crystalline structure. Porsche casts its rotors with holes, to avoid compromising the rotor's integrity and help prevent cracking. Reducing the surface area of the rotor reduces the ability to transfer heat from pad/caliper to rotor. Reducing the rotor's mass means it can absorb (and therefore dissipate) less heat. Since the entire point of the braking system is to transform kinetic energy into thermal energy and disperse that energy into the air, that means less braking capability overall.

Really good thread on the issue: http://www.celicatech.com/forums/showthrea...ors-quot-Thread
post Jun 22, 2011 - 4:46 AM
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malpaso



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my opinion:
- slotted? yes...
- drilled/dented? yes...
- through drilled or cross drilled? NEVER!


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________[Featured Celica of 6gc.net @ 2010]_________
post Jun 22, 2011 - 4:53 AM
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Johnnyny



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power Slot rotors
post Jun 22, 2011 - 9:05 AM
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LAcelica94St

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QUOTE (Galcobar @ Jun 22, 2011 - 5:33 AM) *
Drilling and slotting brake rotors is really a fools game in this day and age. At a time when brake pads off-gassed, holes through the rotor were a way to ensure proper contact. Back when brake pads glazed due to high heat, slots would scrape the glazing and restore a proper friction surface.

Now neither are necessary, courtesy of modern pad formulations which prevent off-gassing, and track/race pads which do not glaze at high heat.

On the other hand, drilling holes or cutting slots in the rotor weakens the metal's crystalline structure. Porsche casts its rotors with holes, to avoid compromising the rotor's integrity and help prevent cracking. Reducing the surface area of the rotor reduces the ability to transfer heat from pad/caliper to rotor. Reducing the rotor's mass means it can absorb (and therefore dissipate) less heat. Since the entire point of the braking system is to transform kinetic energy into thermal energy and disperse that energy into the air, that means less braking capability overall.

Really good thread on the issue: http://www.celicatech.com/forums/showthrea...ors-quot-Thread



wow. that really answers my question. thanks doc! bowdown.gif
post Jun 22, 2011 - 11:32 PM
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BonzaiCelica



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brembo blanks x2. Although I do like the idea that powerslot paints in the inside of their vented front disk rotors to prevent rust build up. Nonetheless brembo all the way!!

getting cheap ebay drilled rotors will crack the disc on the track.

This post has been edited by BonzaiCelica: Jun 22, 2011 - 11:33 PM


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post Jul 14, 2011 - 5:51 PM
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alex1981

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I know not for this car marque at all, but on my old Astra, the best disks I ever had were some Black Diamond combis - they were brilliant and decreased brake fade a lot - and lasted more than twice the time of the standard disks. If I can afford it I will go for these on my Celica when they get worn out, I reckon it will make the braking quite impressive (I think it already is as standard tbh!)

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